package io.renren.utils;

import io.renren.entity.ColumnEntity;
import io.renren.entity.TableEntity;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.WordUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;

import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 代码生成器 工具类
 *
 * @author chenshun
 * @email sunlightcs@gmail.com
 * @date 2016年12月19日 下午11:40:24
 */
public class GenUtils {

    public static List<String> getTemplates(String modelType) {
        List<String> templates = new ArrayList<String>();
        templates.add("template/" + modelType + "/Entity.java.vm");
        templates.add("template/" + modelType + "/Dao.java.vm");
        templates.add("template/" + modelType + "/Dao.xml.vm");
        templates.add("template/" + modelType + "/Service.java.vm");
        templates.add("template/" + modelType + "/ServiceImpl.java.vm");
        templates.add("template/" + modelType + "/Controller.java.vm");
        // templates.add("template/menu.sql.vm");
        templates.add("template/" + modelType + "/DTO.java.vm");
        templates.add("template/" + modelType + "/index.vue.vm");
        templates.add("template/" + modelType + "/add-or-update.vue.vm");
        templates.add("template/" + modelType + "/Cnvt.java.vm");
        //templates.add("template/" + modelType + "/HandleRestService.java.vm");
        //templates.add("template/" + modelType + "/HandleRestServiceImpl.java.vm");
        /*
         *
         *
         * templates.add("template"+modelType+"/HandleService.java.vm");
         * templates.add("template"+modelType+"/HandleServiceImpl.java.vm");
         */

        return templates;
    }
    
    public static List<String> getHadleTemplates(String modelType) {
        List<String> templates = new ArrayList<String>();
        templates.add("template/" + modelType + "/HandleRestService.java.vm");
        templates.add("template/" + modelType + "/HandleRestServiceImpl.java.vm");
        /*
         *
         *
         * templates.add("template"+modelType+"/HandleService.java.vm");
         * templates.add("template"+modelType+"/HandleServiceImpl.java.vm");
         */

        return templates;
    }

    /**
     * 生成代码
     */
    public static void generatorCode(Map<String, String> table, List<Map<String, String>> columns, String modelType,
                                     ZipOutputStream zip) {
        // 配置信息
        Configuration config = getConfig();
        boolean hasBigDecimal = false;
        // 表信息
        TableEntity tableEntity = new TableEntity();
        tableEntity.setTableName(table.get("tableName"));
        tableEntity.setComments(table.get("tableComment"));
        // 表名转换成Java类名
        String className = tableToJava(tableEntity.getTableName(), config.getString("tablePrefix"));
        tableEntity.setClassName(className);
        tableEntity.setClassname(StringUtils.uncapitalize(className));


        // 列信息
        List<ColumnEntity> columsList = new ArrayList<>();
        for (Map<String, String> column : columns) {
            ColumnEntity columnEntity = new ColumnEntity();
            columnEntity.setColumnName(column.get("columnName"));
            columnEntity.setDataType(column.get("dataType"));
            columnEntity.setComments(column.get("columnComment"));
            columnEntity.setExtra(column.get("extra"));

            // 列名转换成Java属性名
            String attrName = columnToJava(columnEntity.getColumnName());
            columnEntity.setAttrName(attrName);
            columnEntity.setAttrname(StringUtils.uncapitalize(attrName));

            // 列的数据类型，转换成Java类型
            String attrType = config.getString(columnEntity.getDataType(), "unknowType");
            columnEntity.setAttrType(attrType);
            if (!hasBigDecimal && attrType.equals("BigDecimal")) {
                hasBigDecimal = true;
            }
            // 是否主键
            if ("PRI".equalsIgnoreCase(column.get("columnKey")) && tableEntity.getPk() == null) {
                tableEntity.setPk(columnEntity);
            }

            columsList.add(columnEntity);
        }
        tableEntity.setColumns(columsList);

        // 没主键，则第一个字段为主键
        if (tableEntity.getPk() == null) {
            tableEntity.setPk(tableEntity.getColumns().get(0));
        }

        // 设置velocity资源加载器
        Properties prop = new Properties();
        prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
        Velocity.init(prop);
        String mainPath = config.getString("mainPath");
        mainPath = StringUtils.isBlank(mainPath) ? "io.renren" : mainPath;
        // 封装模板数据
        Map<String, Object> map = new HashMap<>();
        map.put("tableName", tableEntity.getTableName());
        map.put("comments", tableEntity.getComments());
        map.put("pk", tableEntity.getPk());
        map.put("className", tableEntity.getClassName());
        map.put("classname", tableEntity.getClassname());
        map.put("pathName", tableEntity.getClassname().toLowerCase());
        map.put("columns", tableEntity.getColumns());
        map.put("hasBigDecimal", hasBigDecimal);
        map.put("mainPath", mainPath);
        map.put("package", config.getString("package"));
        map.put("moduleName", config.getString("moduleName"));
        map.put("modulename", config.getString("moduleName").toLowerCase());
        map.put("ModuleName", StringUtils.capitalize(config.getString("moduleName")));
        map.put("author", config.getString("author"));
        map.put("email", config.getString("email"));
        map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
       
        VelocityContext context = new VelocityContext(map);

        // 获取模板列表
        List<String> templates = getTemplates(modelType);
        for (String template : templates) {
            // 渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, "UTF-8");
            tpl.merge(context, sw);

            try {
                // 添加到zip
                String fileName = getFileName(template, tableEntity.getClassName(), config.getString("package"),
                        config.getString("moduleName"));
                zip.putNextEntry(new ZipEntry(fileName));
                IOUtils.write(sw.toString(), zip, "UTF-8");
                IOUtils.closeQuietly(sw);
                zip.closeEntry();
            } catch (IOException e) {
                throw new RRException("渲染模板失败，表名：" + tableEntity.getTableName(), e);
            }
        }
    }
    
    
    
    /**
     * 生成代码
     */
    public static void generatorHandleCode(List<String> serviceNameList, String modelType,
                                     ZipOutputStream zip) {
        // 配置信息
        Configuration config = getConfig();
        boolean hasBigDecimal = false;
        List<String> newServiceNameList = new ArrayList<>();
        for (String tmp : serviceNameList) {
            String tmpServiceName = tableToJava(tmp, config.getString("tablePrefix"));
            newServiceNameList.add(tmpServiceName);
        }    
        // 设置velocity资源加载器
        Properties prop = new Properties();
        prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
        Velocity.init(prop);
        String mainPath = config.getString("mainPath");
        mainPath = StringUtils.isBlank(mainPath) ? "io.renren" : mainPath;
        // 封装模板数据
        Map<String, Object> map = new HashMap<>();
        map.put("hasBigDecimal", hasBigDecimal);
        map.put("mainPath", mainPath);
        map.put("package", config.getString("package"));
        map.put("moduleName", config.getString("moduleName"));
        map.put("modulename", config.getString("moduleName").toLowerCase());
        map.put("ModuleName", StringUtils.capitalize(config.getString("moduleName")));
        map.put("author", config.getString("author"));
        map.put("email", config.getString("email"));
        map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
        map.put("serviceNameList", newServiceNameList);
        VelocityContext context = new VelocityContext(map);

        // 获取模板列表
        List<String> templates = getHadleTemplates(modelType);
        for (String template : templates) {
            // 渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, "UTF-8");
            tpl.merge(context, sw);

            try {
                // 添加到zip
                String fileName = getSaveHandleFileName(template,config.getString("package"),
                        config.getString("moduleName"));
                zip.putNextEntry(new ZipEntry(fileName));
                IOUtils.write(sw.toString(), zip, "UTF-8");
                IOUtils.closeQuietly(sw);
                zip.closeEntry();
            } catch (IOException e) {
                throw new RRException("渲染模板失败" , e);
            }
        }
    }
    
    

    /**
     * 列名转换成Java属性名
     */
    public static String columnToJava(String columnName) {
    	List<Integer> result=CommonStringHandleUtil.checkStringContainUppercase(columnName);
    	if(result==null||result.isEmpty()) {
    		return WordUtils.capitalizeFully(columnName, new char[]{'_'}).replace("_", "");
        }else {
        	return columnName;
        }
    }

    /**
     * 表名转换成Java类名
     */
    public static String tableToJava(String tableName, String tablePrefix) {
        if (StringUtils.isNotBlank(tablePrefix)) {
            tableName = tableName.replaceFirst(tablePrefix, "");
        }
        return columnToJava(tableName);
    }

    /**
     * 获取配置信息
     */
    public static Configuration getConfig() {
        try {
            return new PropertiesConfiguration("generator.properties");
        } catch (ConfigurationException e) {
            throw new RRException("获取配置文件失败，", e);
        }
    }

    /**
     * 获取文件名
     */
    public static String getFileName(String template, String className, String packageName, String moduleName) {
        String packagePath = "main" + File.separator + "java" + File.separator;
        if (StringUtils.isNotBlank(packageName)) {
            packagePath += packageName.replace(".", File.separator) + File.separator + moduleName + File.separator;
        }

        if (template.contains("Entity.java.vm")) {
            return packagePath + "domain" + File.separator + className + "Entity.java";
        }

        if (template.contains("Dao.java.vm")) {
            return packagePath + "mapper" + File.separator + className + "Mapper.java";
        }

        if (template.contains("Service.java.vm")) {    
                return packagePath + "service" + File.separator + className + "Service.java";
        }

        if (template.contains("ServiceImpl.java.vm")) {
            
                return packagePath + "service" + File.separator + "impl" + File.separator + className + "ServiceImpl.java";
            
        }

        if (template.contains("Controller.java.vm")) {
            return packagePath + "controller" + File.separator + className + "Controller.java";
        }

        if (template.contains("Dao.xml.vm")) {
            return "main" + File.separator + "resources" + File.separator + "mybatis" + File.separator + "mapper"
                    + File.separator + File.separator + className + "Mapper.xml";
        }

        if (template.contains("menu.sql.vm")) {
            return className.toLowerCase() + "_menu.sql";
        }

        if (template.contains("index.vue.vm")) {
            return "main" + File.separator + "resources" + File.separator + "src" + File.separator + "views"
                    + File.separator + "modules" + File.separator + moduleName + File.separator
                    + className.toLowerCase() + ".vue";
        }

        if (template.contains("add-or-update.vue.vm")) {
            return "main" + File.separator + "resources" + File.separator + "src" + File.separator + "views"
                    + File.separator + "modules" + File.separator + moduleName + File.separator
                    + className.toLowerCase() + "-add-or-update.vue";
        }

        if (template.contains("DTO.java.vm")) {
            return packagePath + "dto" + File.separator + className + "DTO.java";
        }

        if (template.contains("Cnvt.java.vm")) {
            return packagePath + "convert" + File.separator + className + "Cnvt.java";
        }


        return null;
    }
    
    public static String getSaveHandleFileName(String template, String packageName, String moduleName) {
    	String handleModuleName = StringUtils.capitalize(moduleName);
        String packagePath = "main" + File.separator + "java" + File.separator;
        if (StringUtils.isNotBlank(packageName)) {
            packagePath += packageName.replace(".", File.separator) + File.separator + moduleName + File.separator;
        }
    	if (template.contains("HandleRestServiceImpl.java.vm")) {
            return packagePath + "service" + File.separator + "impl" + File.separator + handleModuleName
                    + "HandleRestServiceImpl.java";
        } else if(template.contains("HandleServiceImpl.java.vm")) {
            return packagePath + "service" + File.separator + "impl" + File.separator + handleModuleName
                    + "HandleServiceImpl.java";
        }
    	
    	if (template.contains("HandleRestService.java.vm")) {
            return packagePath + "service" + File.separator + handleModuleName + "HandleRestService.java";
        } else if (template.contains("HandleService.java.vm")) {
            return packagePath + "service" + File.separator + "impl" + File.separator + handleModuleName
                    + "HandleService.java";
        } 
    	
    	return null;
    }
    
    
}
